Originally Posted by ashill

It's not a published benefit, and not one I've had any luck taking advantage of online as a DL Platinum (back when DL and AS were still buddy-buddy) or as an AA Platinum. So I doubt you'll have any luck as an EXP (for most things, the reciprocal benefits between AA and AS are the same for EXPs and Platinums), but I don't quite have specific experience.

I have not tried doing this with an agent, so I don't know if they're more lenient with partner elites than online check-in is.